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Author Topic: 4cylinder to 5.0 conversion ????'s Bottle Fed ¯ Member # 2686 posted                              what exactly do you need to swap for this conversion...I know the rearend, tranny, and motor of course...the wiring I know, but what exactly besides the main harness to the engine...any detailed help or responses would be great..... -------------------- 1988 Saleen convt #522 SC 1989 Saleen #420 408 w/BOOST! 2009 M5 2000 Yamaha R1 2016 S6 Posts: 2269 | From: San Francisco | Registered: Apr 2003  |  : Coyoteswapfox92 ¯ Member # 4057 posted                              I personally have done one of these so If you have more questions PM me and I will be more than happy to help. Well it looks like you have the main stuff down. when you do the rear end take the brake cables off the 4cyl and put it on the 8.8 rear it will save you lots of time and a little money. Also you will need to swap the fuel lines as they are on the other side of the car with a 5.0. well good lunk with your project PM me if you need help. -------------------- 1992 Coyote project under construction. Posts: 1052 | From: Yuba City, Ca | Registered: Jan 2004  |  : 4RS FED ¯ Member # 2067 posted                                 as parker has said paul, i have done it myself, and got it all memorized.. the basics.... complete underhood wiring harness= main harness 02 harness starter harness alternator harness then you need the complete rear brake lines, all the way from the master cylinder to the rearend then you need the complete fuel lines all the way from the rear to the front as well. you must also install a different gaugue cluster, the 4cylinder will not work, for the fact the rpms will be off. you must also install a fuel pump relay, the 4cylinder uses the computer to trigger the fuel pump, where as a 5.0 uses the relay under the seat and that is just a few of the things. let me know when you need more -------------------- i have a twin turbo mustang and you don't! Posts: 3686 | From: 650 | Registered: Nov 2002  |  : Blind 2.3L CAFords OG Member # 3052 posted                              I'm in the process of a 4 - 8 swap and have found this webpage to be pretty good info: http://mr5oh.tripod.com/4to8.html -------------------- 89 LX Notchback ex 4cyl, 14psi 02 Harley F150, 15psi Posts: 8521 | From: Fairfield | Registered: Jul 2003  |  : Bottle Fed ¯ Member # 2686 posted                              thanks for all the help guys, Rob, Parker etc..... -------------------- 1988 Saleen convt #522 SC 1989 Saleen #420 408 w/BOOST! 2009 M5 2000 Yamaha R1 2016 S6 Posts: 2269 | From: San Francisco | Registered: Apr 2003  |  : stoauto ¯ Member # 2803 posted                              carb Posts: 1054 | Registered: May 2003  |  : AcesWild85 ¯ Member # 2616 posted                              Don't forget about upgrading the front brakes. I have a set of 5.0 calipers if you're interested -------------------- College student and U.S. Marine; The possibilities are endless... Mustangs aren't built; they're born! Posts: 844 | From: San Jose, CA | Registered: Mar 2003  |  : Bottle Fed ¯ Member # 2686 posted                              ttt.... -------------------- 1988 Saleen convt #522 SC 1989 Saleen #420 408 w/BOOST! 2009 M5 2000 Yamaha R1 2016 S6 Posts: 2269 | From: San Francisco | Registered: Apr 2003  |  :

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